Enrico eeroldi



E. FEROLDI.

CARBURETER FOR EXPLOSION ENGINES.

APPLICATION FILED FEB. 28. 1918.

1 ,3 1 4,3 1 3 Patented Aug. 26, 1919.

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ENRICO FEROLDI, OF TURIN, ITALY.

'CARBURETER FOR EXPLOSION-ENGINES.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application filed February 28, 1918. Serial No. 219,556.

To all whom it may concern:

Be it known that I, ENRICO FEROLDI, subject of the King of Italy, andresident of Turin, Italy, have invented. certain new and usefulImprovements in Carbureters for Explosion-Engines, of which thefollowing is a specification. As it is known in the carburetors forexplosion engines the fuel is fed into the constant level or float tankthrough a needle valve controlled b the float so as to close the fuelinlet orifice when the fuel has reached a given level in said tank.

With such an arrangement when the float is damaged and is filled in withfuel, or the oarbureter is reversed, or generally when the float comesout of proper operation, the same float does no longer control the fuelvalve and this latter is free to be lifted exceedingly by the fuelpressure so that the fuel tank becomes filled in and the operation ofthe carbureter is not satisfactory.

This invention has for its object an arrangement allowing of avoidingthe drawback objected to by limiting the fuel supply in said float tankto the quantity required for the normal runnin of the engine even in thecases in which the float does not properly operate to control saidneedle valve.

The annexed drawing shows by way of example a construction of thecarburetor according to this invention, the figure of the drawing beinga central section of said construction.

As shown in the drawing, the float tank 1, which may have any requiredshape and dimensions, is connected with the feeding pipe by means of theconnecting piece 2 and communicates with the carbureter nozzle throughpassage 3; in said tank 1 is arranged the float 1 which controls theneedle valve 7 by means of counterweighted levers 5 pivoted at 6 in thecover of tank 1, said needle valve being intended to shut the fuelsupplying orifice.

According to this invention the lifting of needle valve 7 is limited bymeans of a stop to the extent required to allow a proper supply of fuelinto the tank, said supply corresponding to the ordinary running of theengine.

This result may be obtained by the construction shown in the drawing, inwhich the lower end of needle 7 is provided with an enlarged portion 8which is encircled by a sleeve 9 projecting from the bottom of tank 1and having holes 10 for the fuel issue. The arrangement and dimensionsof portion 8 and sleeve 9 with regard to each other are such as when theneedle 7 closes the fuel inlet orifice the upper face of enlargedportion 8 takes place into the sleeve 9 while when said upper face ofenlarged portion 8 is at the level of the upper face of sleeve 9, thelifting of needle 7 corresponds to the fuel supply required for thenormal running of the engine.

Thus when the float A properly operates to control the needle 7, theoperation of valve 7 takes place as usual; on the contrary when thefloat is damaged and filled in with fuel it rests by its weight on thesleeve 9 and thus the needle 7 can be lifted only to the extent requiredfor the proper supply of the engine at its normal running owing to thefact that the enlarged portion 8 comes into engagement with the lowerface of said float.

The same result is obtained when the carbureter is reversed as in thiscase the float is carried by its buoyancy against the sleeve 9.

What I claim as my invention and desire to secure by United StatesLetters Patent is:

In fuel feeding devices for carburetors for explosion englnes, aconstant level tank in which the fuel is fed, a valve controlling thesupply of fuel in said tank, a float operating said valve, means in thetank on which rests the float when it comes out of operation and meanson said valve intended to engage said float when it rests on said meansto limit the lifting of said valve to the extent corresponding to thefuel supply required for the normal running of the engine.

Signed at Turin, Italy, this 15 day of October, A. D. 1917.

ENRICO FEROLDI.

Witnesses:

MARIO Dnvnom, GUIsnrP DE LUS.

Copies of this patent may be obtained for five cents each, by addressingthe "commissioner of Patents, Washington, D. 0."

